Vein recognition technology is a new topic in the field of biometrics today, and it is an advanced bio-internal feature recognition technology. The basic principle is to irradiate the finger or the palm of the hand with near-infrared light, and obtain the vein image of the human body by using the absorption characteristics of the venous blood to the infrared light, and then pre-process and recognize through the image processing technology. The vein recognition technology adopts a non-contact camera collection method to obtain living biological information, and has the characteristics of anti-theft, high recognition accuracy and low requirements for collection conditions.
To achieve vein recognition, a complete system should have the following functions: acquisition of vein images, storage of vein images, feature extraction and matching of vein images, and output of recognition results. Today, Xiaobian comes to bring you a few specific examples of vein recognition implementation:
1. Tongyuan micro-intelligence refers to the single-door ban program
Tongyuan micro finger vein identification module
Tongyuan Micro-Intelligence has launched the industry's first intelligent terminal for micro-intelligence identification, which is widely used in important security sites, high-end building access control, and test site identification and authentication. A micro-encryption is an intelligent identification product that confirms an individual's identity by collecting an image of a finger vein. The product uses top-notch vein recognition technology, which is superior to fingerprints, face, iris and other products based on surface biometrics in terms of safety and precision. It is suitable for high security level security systems and identity identification.
Tongyuan micro-intelligence finger vein recognition program provides the following types of support, including: finger vein collection and recognition application module, fingerprint identification SDK, micro-element lock and other products.
In addition, the micro-genlock also integrates a variety of enhanced authentication identities such as duress alarms, has a very high safety factor, and the verification of the micro-element lock is not affected by external conditions such as finger surface stains, moisture levels, and molting. No error, easy to use finger acquisition, almost no error, the error rate (FAR) of accepting unregistered fingers is less than 0.0001%.
Micro-lock also supports four interfaces: Wiegand interface (support Wiegand26/34 communication protocol), RS485 interface (support RS485 communication protocol), LAN interface (support TCP/IP communication protocol), USB interface (support USB2.0 communication) Agreement), can be used for identity verification in various occasions such as access control, examination room, and financial field.
Tongyuan finger vein identification has provided many real-life identification solutions, including single-access finger vein recognition, multi-door finger vein recognition, campus attendance vein recognition, social security identity identification, and field identification identification.
The following is a brief introduction to the specific application of the micro-lock in the single door ban identification:
The micro-lock integrates the information of collecting finger veins, stores finger vein information, calculates the functions of vein pattern, encryption, etc., and sends an instruction of “onâ€, “not open†or “alarm†to the access controller to the single access control system. Form a solution for intelligent control.
Hardware product composition
In addition, the configuration of the single access control scheme is flexible and diverse, and there are various applications such as standard configuration, vein enhanced version configuration, password enhanced version configuration, IC card enhanced version configuration, and anti-stress enhanced version configuration.
Use process
Applicable scene
High-end building access control, small prisons, detention centers, gun magazines, fireworks, confidential rooms, important computer rooms, gold shops, treasury and other places that require a single door security system.
Second, the use of ADI company ADSP-BF533 to achieve vein image processing recognition
ADI's ADSP-BF533 vein identification block diagram
The whole vein recognition system consists of two parts: vein image acquisition + vein image recognition. The vein image is acquired by ordinary black and white analog camera in near-infrared illumination, while the image post-processing work is transferred to ADSP-BF533 to realize vein image refinement and features. Extraction and identification.
The Blackfin533 DSP (ADSP-BF533) is a core processing unit that provides developers with a single instruction set and programming environment. The ADSP-BF533 has high performance and can operate at 600MHz at 1200MMAC/s (million times per second), which is enough to run the vein recognition algorithm. At the same time, its dynamic power management mechanism can greatly reduce the overall power consumption of the device. Blackfin's instruction set includes video processing instructions that are ideal for image processing.
The ADSP-BF533 provides a parallel interface (PPI) that interfaces directly to parallel A/D and D/A converters, ITU2601/656 compliant video encoders and decoders, and other general purpose peripherals. The PPI contains a dedicated clock pin, up to 3 frame sync pins and up to 16 data pins. The vein image is collected by the analog camera and then subjected to analog-to-digital conversion. The PPI interface enters the DSP for further processing.
ADSP-BF533 Block Diagram
The ADSP-BF533 has a dedicated external FLASH/SDRAM controller. FLASH is used to store acquired vein images and standard vein characteristics information. SDRAM is used to cache image data. The serial interface (SPI) of the ADSP-BF533 is connected to the LCD to output the recognition result. At the same time, if the system is expanded in the future, LCD can also be used as an important channel for human-computer interaction.
Third, Fujitsu PalmPass palm vein identification program
PalmPass is a subsidiary of Fujitsu, specializing in the application of palm identification technology and related biometric security products. PalmPass provides the world's leading palm vein recognition technology, which is widely used in public sectors such as banking, telecommunications, public security, social security, industrial and mining enterprises, tourism services, educational institutions, and commercial circulation.
The palm vein recognition instrument uses a near-infrared sensor to obtain the distribution map of the palm vein, store the template, and then establish a unique palm vein database for each person; and manage the biometric function by logging in each person's palm vein data. It can connect to the access controller and external devices and networks, with voice prompt information and display functions.
Fujitsu PalmPass palm vein recognition products include: PSN900 series, PSN900 Plus series, PSN900 Lite series, palm vein collection instrument and so on.
Fujitsu PSN900 Plus Series
Palm vein recognition technology has the following natural advantages compared to common biometric technologies such as fingerprints and faces:
1. The palm vein is a biometric feature that is not visible to the naked eye. The existing public technologies in the world cannot complete the reproduction and forgery. Fingerprints and faces are external biometrics that are easily copied and forged;
2. Unique algorithm and reasonable sampling point design ensure the highest level of recognition rate and error prevention rate;
3. Compared with fingerprint identification products, it has the advantage of supporting non-contact use and is more sanitary.
4. Compared with face recognition products, there is almost no limit to the requirements of ambient light and user standing position and posture, and it is easier to use and reliable.
Fujitsu palm vein recognition technology has been applied to basic physical access control system, enterprise one palm management system, kindergarten shuttle safety management system, intelligent building management system, intelligent community integration system, scenic ticket management system, medical service identity authentication system, library Cardless intelligent management system, public security and judicial management system, financial industry cardless payment system, palm management business management system and other daily application scenarios.
PalmPass vein identification part application example:
Basic physical access control system
Enterprise management system
Scenic ticket management system
Medical service identity authentication system
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